Conversion of substituted 5-aryloxypyrazolecarbaldehydes into reduced 3,4′-bipyrazoles: synthesis and characterization, and the structures of four precursors and two products, and their supramolecular assembly in zero, one and two dimensions
作者:Haruvegowda Kiran Kumar、Hemmige S. Yathirajan、Nagaraj Manju、Balakrishna Kalluraya、Ravindranath S. Rathore、Christopher Glidewell
DOI:10.1107/s2053229619006752
日期:2019.6.1
C21H16N2O2, (V), and 3‐methyl‐1‐phenyl‐5‐(piperidin‐1‐yl)‐1H‐pyrazole‐4‐carbaldehyde, C16H19N3O, (VI), (3RS)‐2‐acetyl‐5‐(4‐azidophenyl)‐5′‐(2‐chlorophenoxy)‐3′‐methyl‐1′‐phenyl‐3,4‐dihydro‐1′H,2H‐[3,4′‐bipyrazole] C27H22ClN7O2, (IX) and (3RS)‐2‐acetyl‐5‐(4‐azidophenyl)‐3′‐methyl‐5′‐(naphthalen‐2‐yloxy)‐1′‐phenyl‐3,4‐dihydro‐1′H,2H‐[3,4′‐bipyrazole] C31H25N7O2, (X), has Z′ = 1, and each is fully ordered
在碱性条件下,5-氯-3-甲基-1-苯基-1 H-吡唑-4-甲醛与酚的反应生成相应的5-芳氧基衍生物;这些甲醛与取代的苯乙酮的后续反应产生相应的查耳酮,然后在乙酸的存在下与肼进行环缩合反应,形成N乙酰化的还原联吡唑。报道了三种5-芳基氧基甲醛和5-哌啶子基类似物以及两种还原联吡唑产物的结构。5-(2-氯苯氧基)-3-甲基-1-苯基-1 H-吡唑-4-甲醛,C 17 H 13 ClN 2 O 2,(II)与Z一起结晶在空间群P中的'= 2 ,在两个独立分子的每一个中表现出甲醛基的取向紊乱。3-甲基-5-(4-硝基苯氧基)-1-苯基-1 H-吡唑-4-甲醛,C 17 H 13 N 3 O 4,(IV),3-甲基-5-(萘2 -(yloxy)-1-苯基-1 H-吡唑-4-甲醛,C 21 H 16 N 2 O 2,(V)和3-甲基-1-苯基-5-(哌啶-1-基)-1 H-吡唑-4-甲醛,C 16 H